Cathead for drilling apparatus



March 22, 1932 GREVE CATHEAD FOR DRILLING APPARATUS Filed Mi ly 5, 1928 INVENTOR Patented Mar. 22 1932 UNITED STAT EDGAR E. GREVE, OF BELLEVUE, PEN NSYLVANIA', AS S IGNO R, BY 'MESNE ASSIGN MENTS, '10 OIL WELL SUPPLY COMPANY, OIlPITTgBURG-H, PENNSYLVANIAfA' COR PORATION OF NEW JERSEY,

CATHEAJD non DRILLTNG APPARATUS Application filed May 5, 192a s am; 275",ees.

This invention relates to improvements in cat heads designed for use in connection with drilling apparatus employed in the oil and gas fields, and the present invention is espe- 5 cially directed to a cat-head that may be replaceably mounted and used on a drive shaft of a twin cylinder steam engine, although my invention is capable of use in connection w1th other power devices.

When rigging up a well, the engine is usually the first unit positioned, but heretofore the engine has not been equipped w1th a cat-head, and the handling of heavy parts of the rigging, etc., has necessitated considerable 5 unnecessary work, due to the absence of a cat-head or its equivalent on the engine.

An object of the present invention is to provide a simple and efficient cat-head construction that may be readily applied to and removed from an engine and utilized for han dling different parts of the well rigging, etc. A further object is to provide a cat-head that may be applied to a drive shaft of a twin cyl- 5 inder engine.

Other objects of the present invention will be apparent from a consideration of the following description taken in connection with the accompanying drawings, or will be here- 0 inafter specifically referred to.

In the drawings, which illustrate an application of my invention:

Fig. 1 is a side elevational view of a cathead embodying my invention,'shown applied to a shaft of an engine;

Fig. 2 is a sectional view, the section being taken on line IIII of Fig. 1; and

Fig. 3 is a fragmentary perspective view, showing a portion of a twin cylinder steam engine, with the cat-head in position on the shaft of the engine.

As illustrated and as preferred, the cathead embodying my invention is designated generally by the numeral 5, and, as'shown, it comprises an open ended split body compris ing two main parts or members 6 and 7, said parts being designed to be assembled and to be suitably joined together, as by a seriesof headed screw bolts 8. The cat-head is designed to be mounted on the engine shaft 9,

and secured thereon for rotative movement therewithjby means of keylO. Asshown by Fig.8, and" as: indicated" by the broken lines of'Fig. '1, the-,cat-head'in useis posi-l tioned on'the engineshaft'between the up- Wardly projecting portions or spaced=apart housing ll-of the engine bed," and is refer: ably spaced relatively to the said portions 11 so as to, prevent slippage :of the'rope over the flanges o'fjthe cat-head and down between theends of the cat-head and the said portions 11 of the bed.

As shown, each of the members 6 and 7 is respectively formed with a central hub portion 12 and 13, a rope-receiving portion 14 and 15 respectively, and with flan es 16 and V 17, the latter being of the usual con guration. When the two members are assembled, it will be seen that open ends a and b are provided. I

Each member 6 and 7 is formed with bolt- 1 receiving apertured lugs or members 6a and a, adapted to receive the screw bolts 8, whereby the said members are securely clamped together. The openings through the lugs 7 a are threaded, while the registering openings of the member So have a smooth ore.

18 designates slots or openings formed in member 6 to permit the connecting bolts 8 to be passed therethrough, and be manipulated to tie the parts together. Member 7 is formed with a key-way 19 adapted to receive the key 10 for securing the cat-head to the engine shaft.

It will be noted that by means of the construction described, I have provided a simple and efficient cat-head that may be readily applied to and removed from a shaft or other rotatable member of a power device, and that the open ends thereof are adapted to fit over into the spaced housings of the engine, of a cat-head mounted on the shaft between the spaced-apart housings, said cat-head being split with the parting extending from oneend to the other so as to be removable from the shaft.

2. The combination with an engine having a shaft and spaced apart housings into which the shaft extends, of a removable cat-head on the shaft having end flanges lying closely adj acent the respective housings to prevent slippage of the rope over said flanges, said cat head being split longitudinally into sections,

and means for securing the sections together.

3. The combination with an engine having a shaft and spaced apart members into which the shaft extends, of a detachablecat-head on the shaft between said members, said cathead having hollow end portions into which said members extend. 4. The combination with an engine having a shaft and spaced apart members into which the shaft extends, of a sectional removable cat-head on the shaft between said members,

said cat-head having outwardly flared flanges disposed closely adjacent said members to be substantially closed thereby and having its parting extending from one end to the other. In testimony whereof I affix my signature.

. EDGAR E. GREVE. 

